Totally agree with Accuray and I think you also typically have to add in extremely powerful sexual attraction. The chemicals being released are like drugs.
There's some great insights online if you google "affair fog".
Honestly, if you are dealing with a full blown EA/PA...I don't think it really matters what you do while the affair is ongoing. I think in an ideal world, you detach and set clear boundaries. It's just not worth the emotional energy to deal with them during the affair.
In my case, my H barely remembers most of the conversations we've had. I've filed for D and am trying to get him out of the house. If anything, he's now starting to wake up a bit...although I think it's too late. I feel done.
M 44, H 46 D11, D9, D5 Married 12 years PA confirmed 9/2011 I filed 3/2012 H moved out 7/2012